Merge upstream main at 254351c01b,
retaining both roadmap histories and the existing anchor and cap fixes.
Document the changed DOCX reader, display builder, raster renderer and
PDF exporter contracts without changing their behavior.
Validation: cargo xtask ci passed all eight stages locally. Optional
craft-i18n catalogs and craft-fonts were absent. Independent local
coverage audit documents all 26 touched functions; CodeRabbit must
recalculate its own metric after a separately approved submission.
Co-Authored-By: GPT-6 <codex@openai.com>